Paper-manufacturing system

ABSTRACT

The present invention concerned with a paper-manufacturing system characterized in that the system is composed of a head box ( 10 ) for providing pulp fluid which is located at the upper part between the our wire part and the felt a out wire part ( 20 ) which is composed of a wire roll ( 21 ), a wire guide roll ( 22 ), a water tray ( 23 ), a forming roll ( 24 ) and a wire belt ( 25 ) and plays a role for enabling the wire rolls (about 5˜6 rolls) ( 21 ) to rotate the wire belt around the wire loop. The surface of the wire rolls is coated with elastomer such as rubber or any other elastic materials.; a press part ( 40 ) which is composed of a suction press roll ( 41 ), a second touch roll ( 42 ), a felt guide roll ( 43 ), a felt roll ( 44 ) and a felt ( 45 ) and a dryer part. The present paper manufacturing system, the inner wire part present in the conventional system is omitted and the inner wire part is replaced with felt loop and two processes are omitted to one process. The rotations of out wire and the forming roll were reversed and the head box located at the lower part between the our wire part ( 20 ) and the inner wire part ( 30 ) is equipped at upper part between the our wire part ( 20 ) and the felt ( 33 ) and the supply function of pulp fluid is greatly improved. The dehydrating function, one of the three core functions of paper-manufacturing system, is greatly improved (a high-speed function). The paper quality is quite improved by improving the forming function. The pick up function and transferring function (transferring function of wet paper) are greatly improved. Accordingly, the conventional paper-manufacturing system can be greatly improved without any installation or any investment by the present invention.

DETAILED DESCRIPTION OF INVENTION PURPOSE OF INVENTION TECHNICAL FIELDTO WHICH THE INVENTION PERTAINS AND THE PRIOR ART IN THIS FILED

[0001] The present invention relates to an improved paper—manufacturingsystem.

[0002]FIG. 1 is a system for showing conventional paper-manufacturingprocesses.

[0003] The conventional paper-manufacturing system is composed of a headbox (10), an out wire part (20), an inner wire part (30), press part(40) and a dryer part (50).

[0004] (1) The head box (10) located at the lower part between the ourwire part (20) and the inner wire part (30) is the part for distributingpulp fluid for manufacturing paper on mesh of the wire belt (25) andplays an important role for distributing the pulp fluid uniformly on themesh of the wire belt (25) having broad width (the width 3˜5 m) and highspeed (1500 m/min equivalent to 90 km/h).(The concentration of theaverage pulp fluid is about 15% of the pulp content).

[0005] (2) The out wire part (20) is composed of the wire roll (21), thewire guide roll (22), the water tray (23), the forming roll (24) and thewire belt (25), and plays a role for enabling the wire rolls (about 5˜6rolls) (21) to rotate the wire belt (25) around the wire loop. Thediameters of the wire rolls are different in accordance with the speedand the width and are about 300˜500 mm. The surface of the wire rolls iscomposed of elastomer such as rubber and other elastic materials.

[0006] The wire guide roll (22) plays a role of performing automaticreturn of the wire belt (25) for enabling the wire belt (25) tocontinuously run without escaping from the central orbit and is coatedwith an elastomer such as rubber like the wire roll.

[0007] The pulp fluid which is supplied on the mesh of wire belt (25)from the head box (10) is composed of about 99.8% or more of water andabout 0.2% or below of pulp and a large amount of water is dischargedoutside the wire box. The water tray (23) is a tub for taking in andmoving water instantaneously discharged from wire box.

[0008] The forming roll (24) is a large-sized driving roll and rotateswith making out wire part (20) and wire belt (25) contact concurrently.Dehydrating and sheet forming are accomplished on this forming roll(24).

[0009] The wire belt (25) is equipped with a net for discharging andfiltering water after receiving dilute pulp fluid.

[0010] (3) The inner wire part (30) is composed of the wire roll (31),the wire guide roll (34), the pick up roll (32) and the inner wire belt(33). The inner wire belt (33) is linked and geared with the formingroll (24). The wire roll (31) and the wire guide roll (31) play the samerole as in the out wire part (20).

[0011] The inner wire part plays a role for transferring the formed wetpaper to the felt of the press part.

[0012] The pick-up roll (32) transfers the wet paper transferred ontothe inner wire part onto the felt and adsorbs the wet paper by producingvacuum and transfers the wet paper onto the felt.

[0013] The vacuum box which is not shown in the drawings, sucks the wetpaper formed on the forming roll at the time of separating the out wireand the inner wire and transfers the wet paper onto the inner wire.

[0014] The inner wire belt (33) is a net like out wire loop but has amore dense structure in order for the wet paper to be transferred ontothe inner wire.

[0015] (4) The press part (40) is composed of the suction press roll(41), the second touch roll (42), the felt guide roll (43), the feltroll (44) and the felt (45).

[0016] The suction press roll (41) linked with the inner wire part (30)is a vacuum roll for pressing moisture of wet paper to the dryer surfacewith high pressure and absorbing the water. The outer shell rotates.However as the outer shell is equipped with vacuum box inside dischargesthe dehydrated water to the outside.

[0017] The second touch roll (42) is a press roll for removing moistureof the dehydrated wet paper from the suction press roll (41) for thesecond time. The second touch roll (42) is a perforated plain roll of novacuum.

[0018] The felt roll (44) enables the felt to rotate following by thefelt loop.

[0019] The felt guide roll (43) plays a role of performing automaticreturn for enabling the felt to continuously run without escaping fromthe central orbit.

[0020] The felt (45) plays a role of conveyer for transferring the wetpaper and provides protection of the wet paper from damage in the caseof pressing and dehydrating the wet paper.

[0021] In the conventional paper manufacturing system, pulp fluiddischarged from the head box are supplied between the out wire belt (25)and the inner wire belt (33) which lies one upon another and rotatearound the forming roll (24). The dilute pulp fluid is dehydrated bypressure of tension of the out wire belt (25). The wet paper filtered bythe out wire and the inner wire is firstly adhered and transferred ontothe inner wire and secondly transferred onto the felt by vacuum ofpickup system. The wet paper on the felt secondly is dehydrated(strongly dehydrated) on the suction press roll and the second touchroll and is transferred and dried onto the Yankee dryer.

[0022] However, this conventional method has been continuously performednearly 100 years or over without any change or improvement of the mainskeleton of the processes of paper manufacturing.

[0023] Consequently, there have been some problems, for example, lowquality, decrease of flexibility, decrease of strength, increase of pinhole and decrease of productivity, etc.

TECHNICAL MATTER TO BE ACCOMPLISHED BY INVENTION

[0024] The present inventor has being studied for improving suchproblems of the conventional paper-manufacturing system for a long timeand finally completed the present invention.

[0025] Therefore, the present invention provides a new improvedpaper-manufacturing system.

[0026] The present inventor omitted the function of the inner wire partfrom the conventional paper-manufacturing system and shortened threeprocesses into two process by replacing the function of the inner wirepart with the felt loop. The rotations of out wire and the forming rollwere reversed and the head box located at the lower part between the ourwire part (20) and the inner wire part (30) is equipped at upper partbetween the our wire part (20) and the felt (33) and the supply functionof pulp fluid is greatly improved. The dehydrating function, one of thethree core function of paper-manufacturing system, is greatly improved(a high-speed function). The paper quality is quietly improved byimproving the forming function. Pick up function and transferringfunction (transferring function of wet paper) are greatly improved.Accordingly, the conventional paper-manufacturing system can be greatlyimproved without any installation or any investment by the presentinvention.

[0027] Therefore, the present invention also provides a method forreforming the conventional paper-manufacturing system.

BRIEF DESCRIPTION OF DRAWINGS

[0028]FIG. 1 is a system showing the conventional paper-manufacturingprocesses.

[0029]FIG. 2 is a system showing paper-manufacturing processes of thepresent invention. 10: Head box 20: Out wire part 40: Press part 50: Drypart

CONSTRUCTION OF INVENTION

[0030] The present invention is detailed explained by the accompanieddrawing 2 and desirable examples.

[0031]FIG. 2 is a system showing paper-manufacturing processes of thepresent invention.

[0032] The paper-manufacturing processes of the present invention arecomposed of head box (10) for providing pulp fluid, out wire part (20),press part (40) and dryer part (50).

[0033] In the present invention, the head box (10) located at the lowerpart between the our wire part (20) and the inner wire part (30) in theconventional system is equipped at upper part between the our wire part(20) and the felt (33). The inner wire part present in the conventionalsystem is omitted and the press part (40) is directly connected withforming roll (24).

[0034] (1) The head box (10) located at the upper part between the ourwire part (20) and the felt (33) is the part for distributing pulp fluidfor manufacturing paper on mesh of the wire belt (25) and plays animportant role for distributing the pulp fluid uniformly on the mesh ofthe wire belt (25) having broad width(the width 3˜5 m) and high speed(1500 m/min equivalent to 90 km/h).(The concentration of the averagepulp fluid is about 0.15 % of the pulp content).

[0035] (2) The out wire part (20) is composed of the wire roll (21), thewire guide roll (22), the water tray (23), the forming roll (24) and thewire belt (25), and plays a role for enabling the wire rolls (about 5˜6rolls) (21) to rotate the wire belt (25) around the wire loop. Thediameters of the wire rolls are different in accordance with the speedand the width, and are about 300˜500 mm. The surface of the wire rollsis composed of elastomers such as rubber and other elastic materials.

[0036] The wire guide roll (22) plays a role of performing automaticreturn of the wire belt (25) for enabling the wire belt (25) tocontinuously run without escaping from the central orbit and is coatedwith an elastomer such as rubber like the wire roll.

[0037] The pulp fluid which is supplied on the mesh of wire belt (25)from the head box (10) is composed of about 99.8% of water and about0.2% of pulp and a large amount of water is discharged outside the wirebox. The water tray (23) is a tub for taking in and moving waterinstantaneously discharged from the wire box.

[0038] The wire belt (25) is equipped with a net for discharging andfiltered water after receiving dilute pulp fluid.

[0039] (3) The press part (40) is composed of the suction press roll(41), the second touch roll (42), the felt guide roll (43), the feltroll (44) and the felt (45).

[0040] The forming roll (24) is a large-sized driving roll and rotateswith making out wire part (20) and wire belt (25) contact concurrently.Dehydrating and sheet-forming are accomplished on this forming roll(24).

[0041] The suction press roll (41) is a vacuum roll for pressingmoisture of wet paper to the dryer surface with high pressure andabsorbing the water. The outer shell rotates. However as the outer shellis equipped with vacuum box inside discharges the dehydrated water tothe outside.

[0042] The second touch roll (42) is a press roll for removing moistureof the dehydrated wet paper from the suction press roll (41) for thesecond time. The second touch roll (42) is a perforated plain roll of novacuum.

[0043] The felt roll (44) enables the felt to rotate following by thefelt loop.

[0044] The felt guide roll (43) plays a role of performing automaticreturn for enabling the felt to continuously run without escaping fromthe central orbit.

[0045] The felt (45) plays a role of conveyer for transferring the wetpaper and provides protection of the wet paper from damage during thecourse of pressing and dehydrating the wet paper.

[0046] In the present paper manufacturing system, pulp fluid dischargedfrom the head box (10) are supplied onto the forming roll (24) betweenthe out wire belt (25) and felt (45) which lies one upon another androtate around the forming roll (24). The dilute pulp fluid isdrastically dehydrated by pressure of the tension of the out wire belt(25), the falling power of the pulp fluid and the centrifugal power. Thewet paper filtered by the out wire is ideally adhered and transferredonto the felt, which has a strong adhesive power. Accordingly, thepresent system can be operated with high speed than in the conventionalsystem without using pick up equipment and can produce a good yield andgood quality of paper. The wet paper on the felt is secondly dehydrated(strongly dehydrated) on the suction press roll and the second touchroll and is transferred and dried onto the dryer part (50) such asYankee dryer.

[0047] The comparative results between the present system and theconventional system are as follow. TABLE 1 Comparitive results betweenthe present system and the conventional system. Item conventional systempresent system Sheet forming + Transfer 3 processes 2 processes Formingpart Forming roll-right rotation Forming roll-left rotation Rotationaldirection of roll Out wire part-left rotation Out wire part-rightrotation Head box location in the lower part location in the upper partLocation of installation Upward material jet Downward material jet Maineffects a) Quality(overall) conventional 100%  160% or more In case thatthe effect of the system is determined as 100, Softness 100%  130% ormore Strength 100%  120% or more Bulk 100%  110% or more Pin Hole & pickout 100%  10% or below b) Productivity increase 100%  150% or more (Sameconditions of quality) Speed about 1200 m/min about 2000 m/min c) Profitefficiency 100% 1000% or more Price superiority 100%  130% or more

[0048] As confirmed in the above table, the present system has excellenteffects when compared with those of the conventional system.

EFFECT OF INVENTION

[0049] In the present paper manufacturing system, the inner wire partpresent in the conventional system is omitted and the inner wire part isreplaced with felt loop and two processes are omitted to one process.The rotations of out wire and the forming roll were reversed and thehead box located at the lower part between the our wire part (20) andthe inner wire part (30) is equipped at upper part between the our wirepart (20) and the felt (33) and the supply function of pulp fluid isgreatly improved. The dehydrating function, one of the three corefunctions of paper-manufacturing system, is greatly improved (ahigh-speed function). The paper quality is quietly improved by improvingthe forming function. The pick up function and transferring function(transferring function of wet paper) are greatly improved. Accordingly,the conventional paper-manufacturing system can be greatly improvedwithout any installation or any investment by the present invention.

1. A paper-manufacturing system characterized in that the system iscomposed of: a head box (10) for providing pulp fluid which is locatedat the upper part between the our wire part and the felt, an out wirepart (20), which is composed of a wire roll (21), a wire guide roll(22), a water tray (23), a forming roll (24) and a wire belt (25), andplays a role for enabling the wire rolls (about 5˜6 rolls) (21) torotate the wire belt around the wire loop. The surface of the wire rollsis coated with elastomer such as rubber or any other elastic materials;and a press part (40) which is composed of a suction press roll (41), asecond touch roll (42), a felt guide roll (43), a felt roll (44) and afelt (45) and a dryer part.
 2. A process for reforming a conventionalpaper-manufacturing system characterized in that in the conventionalpaper-manufacturing system composed of a head box (10), a out wire part(20), a inner wire part (30), press part (40) and a dryer part (50), andthe inner wire part (30) is omitted and the inner wire part is replacedwith felt loop and two processes are omitted to one process. Therotations of the out wire and the forming roll are reversed and the headbox located at the lower part between the out wire part (20) and theinner wire part (30) is equipped at upper part between the out wire part(20) and the felt (33).